Karl lofhjelm



(No Model.)

K. LUPHJELM. APPARATUS FOR DISTILLING TAB AND REFINING TURPBNTINB. N0. 546% I Patented Sept. 10, 1895.

ATENT FFIQE.

KARL LOFHJELM, OF ULEABORG, FINLAND.

APPARATUS FOR DISTILLING TAR AND REFINING TURPENTINE.

SPECIFICATION forming part of Letters Patent No. 546,018, dated September 10, 1895..

App i i n filed October 11, 1894. Serial No. 525,650. (No model.) Patented in Finland August 10, 1892, No. 429,

'7,1893,N0.446,andi11 Sweden December 19,1893,No. 5,052.

To 66 whom it may concern:

Be it known that I, KARL LoFHJELM, a subject of the Czar of Russia, and a resident of Uleaborg, Finland, have invented certain new and useful Improvements in Tar-Distilling and Turpentine-RefiningApparatus, of which the following is a specification, and for which Letters Patent have been granted to me in Sweden, No. 5,052, dated December 19, 1893, and in Finland, N0. 429, dated August 10, 1892, and No. 446, dated February 7, 1893.

My invention consists of an improved construction of apparatus comprising a combination of tar-distilling and turpentine-refining apparatus whereby part of the heat of the volatile products of the tar-still is utilized for heat ing the turpentine-refining still, and the turpentine-still forms part of the condensing apparatus for said products of the tar-still; and the invention also consists of a return branch in the condensing-worm for the Wood products whereby they are more effectively condensed, all as hereinafter fully described, reference being made to the accompanying drawings, in which- Figure l is mainly a sectional elevation of the apparatus, but with some parts in side elevation. Fig. 2 is a horizontal section of the wood-still and plan view of the rest of the apparatus.

A represents the tar-still, which may be of any approved construction, but in this example consists of the sheet-metal tank a, inclosed in the brick jacket I), with intermediate heat-fines c and chambers d, and a furnace e for supplying the heat.

f represents theturpentine-refining still, and g the condensing-worm for completing the cooling of the wood acids, &c.

The tar-receiver is represented at h. It is connected with the bottom of the wood-still by the pipe i, having suitable descending inclination for the tar to flow into it from the still. The same receiver is also connected with the tank j by a pipe 7c for drawing off the tar, and said receiver is also connected from the top with the turpentine-still by the pipe Z. This still consists of a tank m, which, besides this connection with the tar-receiver, is also connected with the top of the tar-still by the pipe and February n and contains another tank 0, suspended within it from the top and forming a cover to it, said tank 0 being of such smaller dimensions that suitable space is included wherein it may besurrounded on the sides and bottom by the hot vapors from the tar-still for heating it. A suitable cover 19 is applied to the tank 0, in which is a stoppered opening q for introducing the turpentine to be refined. Said cover carries a steam-inlet pipe .9 for introducingsteam fortreat-ingtheturpentinethere with, and a pipe 25 connects tank 0 through said coverwith the condensing-worm it for condensing the vaporous products ofthe turpentinestill, said worm being placed in a cooling-tank 'v and connected with a receiver to, as commonly arranged. The bottom of tank ois connected through the bottom of tank m with a cock 0' for drawing off the residual products of the turpentine from time to time. The steam-pipe s of the turpentinestill is provided with a regulating-cock a and is perforated in the lower part, as indicated at b, for distributing the steam.

The lower part of tank m is connected by the pipe 6' with the condensing-worm gin the cooler at, and a branch pipe f leads out of the bottom of said pipe e into a receiver g suitable forthe separation of the pitch-oil from the gaseous products rising up into the condenser g. This branch maybe connected directly into the bottom of tank m instead of pipe e, if preferred. 'Iheturpentine-still being thus heated by the gaseous products of the tar-still before entering the condenser, they are sufficiently cooledin advance of the condenser for such separation of the pitch-oil, which would otherwise go along with the rest of the products of the tar-still directly into condenser g and would be less pure. The worm g discharges into receiver h.

From the lower coil of the worm g is a verarate receiver j. 70' indicates a vent-pipe that may be applied to receiver j.

It will be seen that the condenser for the wood-gases may be simpler and cheaper because of the cooling effect of the turpentinestill and the separation therein of the pitchoil of said gases. The turpentine-still may also be simpler. and cheaper because the furnace that would otherwise be required is dispensed with, and the expense of heat for the turpentine-still is economized because of utilizing the heat of the Wood gases therefor.

Another advantage of utilizing the gases of the tar-still for heating the turpentine-still is greater safety against ignition of the turpentine-gases,which is very liable to happen when fire heat is used.

I claim-- 1. The combination of the tar still, the turpentine still consisting of-the jacketed turpentine holding tank, the tar receiver connected with the tar still by the pipe descending from the tar still thereto, and the condenser for the Wood gases, said tar still and tar receiver connected with the jacket of the turpentine still for conducting the wood gases thereto, and

said condenser connected with said jacket of the turpentine still for receiving the gases therefrom substantially as described.

2. The combination of the tar still as A, the turpentine still consisting of the turpentine holding tank 0, and the inclosing jacket m; condenser for the Wood gases as g, tar receiver as h, the pipe as n, connecting the tar still and turpentine still; the pipe e connecting the jacket of the turpentine still with the condenser g, and the branch pipe f for discharging the condensed vapors from the said jacket of the turpentine still substantially as described.

3. The combination with the condensing worm for the wood gases of the branch Worm connected with the lower part of said worm and returning upward and thence downward along said condensing worm, and connected with a separate receiver substantially as described.

Signed at Uleaborg, Finland, this 14th day of July, A. D. 1894:.

KARL LOFHJELM.

Witnesses:

E. NYLANDER, B. HAGLUND. 

